Standard: GB 24 - 1976
Available sizes: (M14) to M8 (6 sizes)
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| (M14) | 2.5 | 12 | 29.72 | 5.48 | 12.35 | 11.65 | 22 | 21.48 | 30 | 5 |
| (M18) | 4 | 19 | 49.66 | 6.48 | 20.42 | 19.58 | 36 | 35.38 | 50 |
| 6 |
| M10 | 2 | 8 | 18.72 | 3.4 | 8.29 | 7.71 | 14 | 13.57 | 19 | 3 |
| M12 | 2.5 | 10 | 23.72 | 4.48 | 10.29 | 9.71 | 18 | 17.57 | 24 | 4 |
| M16 | 3 | 14 | 35.66 | 5.48 | 15.35 | 14.65 | 27 | 26.48 | 36 | 5 |
| M8 | 1.5 | 6 | 13.76 | 2.9 | 6.24 | 5.76 | 10 | 9.64 | 14 | 2.5 |
Standard corrosion protection for indoor and mild outdoor environments.
Salt spray: 96–200 hours | RoHS compliant (trivalent chromium)
High-performance coating for automotive, marine, and harsh environments.
Salt spray: 720–1500 hours | Recommended for grade 8.8+
Heavy-duty protection for structural and outdoor applications.
Salt spray: 500–1000 hours | Thread tolerance adjustment required
Note for high-strength fasteners (Grade 10.9, 12.9): Electroplating processes require hydrogen embrittlement relief baking (minimum 4 hours at 200°C within 4 hours of plating). Contact our engineering team for grade-specific plating recommendations.
Request detailed technical specifications, material certifications, and availability information for your application requirements. Our engineering team can provide product recommendations, custom specifications, and technical documentation.
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